1620 Geographos (1951 RA)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3355121545 ± 2.00e+00
Semi-major axis (a)1.2457769668 AU ± 3.00e+00
Inclination (i)13.33577542° ± 4.00e+00
Long. of Asc. Node (Ω)337.14082621° ± 5.00e+00
Arg. of Perihelion (ω)277.01835526° ± 6.00e+00
Mean Anomaly (M)212.92032873° ± 2.36e-05
Mean Motion (n)0.7088458984°/day ± 2.56e+00
Perihelion dist (q)0.82780365 AU ± 3.19e+00
Aphelion dist (Q)1.66375028 AU ± 4.72e+00
Orbital Period1.39046623 yr ± 5.02e+00
NGA Modelr2
A23.55475120e-06 AU/d²
Physical Parameters
H (abs. magnitude)15.26
G (slope)0.15
Alternative Designations

1983 CY3

Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.276″
Uncertainty0
Orbit TypeApollo
MOID0.028806 AU
Observations Used9056
Radar Obs Used5
Gaia Obs Used104
Oppositions19
Arc Total1951-2017
First Observation Used1951-08-31
Last Observation Used2026-04-08
Observations (11927)
Date Type RA Dec Mag Band Observatory
2019-05-08 06:07:44 C 07 35 39.37 +15 23 02.5 V T05
2019-05-08 06:17:17 C 07 35 40.26 +15 22 54.1 V T05
2019-05-08 06:39:58 C 07 35 42.40 +15 22 34.6 V T05
2019-05-12 06:13:28 C 07 44 55.27 +13 59 06.7 V T05
2019-05-12 06:20:50 C 07 44 55.97 +13 59 00.0 V T05
2019-05-12 06:25:26 C 07 44 56.40 +13 58 55.7 V T05
2019-05-12 06:40:03 C 07 44 57.78 +13 58 42.8 V T05
2019-05-14 06:35:33 C 07 49 36.60 +13 15 37.0 V T08
2019-05-14 06:39:32 C 07 49 36.85 +13 15 31.9 V T08
2019-05-14 06:46:52 C 07 49 37.69 +13 15 25.1 V T08
2019-05-14 07:04:15 C 07 49 39.31 +13 15 10.8 V T08
2019-05-16 06:15:21 C 07 54 14.64 +12 31 53.8 V T05
2019-05-16 06:20:43 C 07 54 15.15 +12 31 49.0 V T05
2019-05-16 06:28:00 C 07 54 15.81 +12 31 41.8 V T05
2019-05-16 06:44:34 C 07 54 17.40 +12 31 26.3 V T05
2019-05-23 06:05:49 C 08 10 37.29 +09 51 09.5 V T05
2019-05-23 06:08:28 C 08 10 37.53 +09 51 06.9 V T05
2019-05-23 06:17:06 C 08 10 38.36 +09 50 58.3 V T05
2019-05-23 06:36:19 C 08 10 40.21 +09 50 39.2 V T05
2019-06-23 17:20:23 C 09 23 44.30 -04 17 58.4 o K95
2019-06-23 17:26:55 C 09 23 44.86 -04 18 06.4 o K95
2019-06-23 17:39:06 C 09 23 45.96 -04 18 21.3 o K95
2019-06-29 07:02:31 C 09 36 25.91 -07 05 15.7 q E89
2019-06-29 07:20:32 C 09 36 27.53 -07 05 37.5 q E89
2019-07-06 06:31:12 C 09 52 27.53 -10 39 17.1 q E89
2019-07-06 06:45:03 C 09 52 28.85 -10 39 35.1 q E89
2019-08-25 08:42:44 C 14 31 12.84 -37 34 11.1 q E89
2019-08-25 08:59:51 C 14 31 24.19 -37 34 07.2 q E89
2019-08-27 07:54:02 C 15 04 00.20 -37 11 32.9 q E89
2019-08-27 07:59:25 C 15 04 03.98 -37 11 27.7 q E89
2019-08-30 05:44:30 C 15 54 38.95 -35 28 11.3 V T05
2019-08-30 05:56:18 C 15 54 47.32 -35 27 45.3 V T05
2019-08-30 06:27:20 C 15 55 09.30 -35 26 36.9 V T05
2019-09-01 23:18:11 C 16 41 05.52 -32 34 39.0 q Y00
2019-09-01 23:20:12 C 16 41 06.92 -32 34 30.3 q Y00
2019-09-01 23:22:42 C 16 41 08.54 -32 34 23.3 q Y00
2019-09-03 06:17:48 C 17 01 44.85 -30 53 26.0 V T05
2019-09-03 06:22:29 C 17 01 47.79 -30 53 09.7 V T05
2019-09-03 06:48:19 C 17 02 04.08 -30 51 38.8 V T05
2019-09-09 18:13:16 C 18 26 29.18 -21 08 15.8 V 089
2019-09-09 18:16:50 C 18 26 30.71 -21 08 02.6 V 089
2019-09-09 18:20:24 C 18 26 32.25 -21 07 49.1 V 089
2019-09-09 18:23:58 C 18 26 33.77 -21 07 36.0 V 089
2019-09-09 18:27:32 C 18 26 35.30 -21 07 22.2 V 089
2019-09-09 18:31:06 C 18 26 36.81 -21 07 09.1 V 089
2019-09-09 18:34:40 C 18 26 38.34 -21 06 55.8 V 089
2019-09-09 18:41:48 C 18 26 41.39 -21 06 29.2 V 089
2019-09-09 18:45:22 C 18 26 42.92 -21 06 16.1 V 089
2019-09-10 08:31:54 S 18 32 38.779 -20 14 47.51 L C51
2019-09-10 10:06:09 S 18 33 18.473 -20 09 04.43 L C51
Radar Observations (12)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1983-02-27 05:00:00 161795 5 Hz 2380 -1 -1
1983-02-27.208333 16179500 500 Hz 2380 251 251
1983-02-28 05:04:00 142007628 30 us 2380 -1 -1
1983-02-28.211111 14200762800 30000 us 2380 251 251
1994-08-28 07:10:00 38936537.06 1.76 us 8510 -14 -14
1994-08-28 07:10:00 -364880.593 0.9 Hz 8510 -14 -14
1994-08-28.298611 3893653706 1760 us 8510 253 253
1994-08-29 04:40:00 42596456.4 1.13 us 8510 -14 -14
1994-08-29 04:40:00 -427851.027 0.2 Hz 8510 -14 -14
1994-08-29.194444 4259645640 1130 us 8510 253 253
1994-09-02 07:20:00 -615553.2 0.5 Hz 8510 -14 -14
1994-09-02.305556 -61555320 50 Hz 8510 253 253
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)